Running Physiology  // Posts categorised as Running Physiology

On DSDs, the theory of testosterone, performance the CAS ruling on Caster Semenya

The Caster Semenya controversy, or more accurately, the issue of DSDs in women's sport, is the most complex issue ever faced by sport. I share here my views, start to finish, in what I hope is a comprehensive overview of the concepts, the evidence, and the weighting of the factors that led to CAS' decision to support the IAAF regulation.

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A short thought on sport: Evaluating Eliud. Is Kipchoge a next-gen 2:02 marathoner, or a mid-2:04 runner in a technologically superior shoe? Who knows?

Eliud Kipchoge is a physiological marvel. The Nike Vaporfly is a technological marvel. Both improve marathon performance. Except these statements can't both be true, and the implications for the integrity of running and how we evaluate performances, can't be ignored. This is an article on why that is.

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The aging of elite performance: “Geriatric champions” and have the rules for getting older changed?

Yesterday, I was sent this link. It says that Dwain Chambers, he of THG and a doping ban in 2004 (!), is making a comeback, hoping to qualify for Team GB at the European Indoor Championships. At the age of 40. Well, almost 41. My first thought was “Of course he is”, and then upon […]

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The pursuit of the sub-2 marathon: Where to next?

Where do we go next? Now that Eliud Kipchoge has taken us to the brink of a sub-2 hour marathon, have the boundaries of human endurance been recalibrated? Can we expect a 1:59 soon? Or did the Nike staged event simply move some of the boundaries aside? This piece looks at potential benefits, and asks whether we should expect to see a speeding up, or a slowing down, in the foreseeable future?

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Eliud Kipchoge 2:00:25

Eliud Kipchoge has run a marathon in 2:00:25, coming within sight of breaking the 2-hour barrier. How did he do it, and what might we expect in future? This post analyzes the splits, the tactics and the prospects for the 1:59:59 in the future.

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The sub-2 hour marathon attempt: The pacing strategy

The Nike-Breaking 2 attempt will happen in Monza this weekend. I don't think a sub-2 is possible, but what will be fascinating is to see a) how they go about pacing the attempt, and what happens if it starts to fall away; and b) what the collective advantage is of all the tactics employed. I predict 2:01:55 at best, a DNF is also a real possibility. More thoughts here.

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Ban the Nike Vaporfly & other carbon fiber devices for future performance credibility

Nike recently unveiled the Vaporfly Elite, the shoe it has been working on to help it break the 2-hour marathon barrier. The shoe incorporates a "spring plate", and is claimed to have significant performance implications. I think the shoe, and the incorporation of spring-like devices in all shoes, should be banned for future credibility of performance. Here's why

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The “2-hour marathon” season begins

Kenenisa Bekele kicks off the 2017 Marathon season in Dubai, with what is a potential world record. It's the year of the "Breaking-2" after Nike's announcement last December. This article is an expanded version of one I wrote for an SA Newspaper on Jan 15th, 2017

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The sub-2 hour marathon in 2017? Thoughts on concept

Nike's announcement that they're backing three top marathoners to break the 2 hour marathon barrier in Spring 2017, is the latest installment in the sub-2 hype. Relevance and legitimacy aside, what would it take, product and course wise, to achieve? I look at shoes and downhill running to illustrate the concept of physiological barriers and how they might be shifted.

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